Skin Test negative, Rast came back a 2

What are his chances? Of a PA or an allergy in general?

Given his siblings allergy, and I would GUESS a parent (or 2) has SOME allergies, a chance of him having allergy is high.

Peanuts? A crapshoot.

If you NEED to know, an in office food challenge would be the gold standard.

Do you NEED to feed him PB? Or should you avoid? I'd avoid on principle. Why have a PB jar in the house, lets say, if DD is allergic, and COULD react to some smudged on the counter, kwim? Why chance it IMO.

I think theres achances of false + OR - with EITHER test. For some one works, for others, the other works.

I would play 'avoid'.

Jason

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[b]* Obsessed * [/b]

What do you trust for a positive PA test?
Skin or Cap Rast?

I think that if you already have a PA child and the other has ANY tests coming back with any kind of sensitivity on either skin prick or blood testing, there isn't much to consider.

I just got back from the allergist this morning, who puts much more faith in the CAP-RASTs than in skin pricks. Hmmm... me, too, come to think of it.

Why play with fire? You have one child who is a known PA and another who has [i]other[/i] allergies. Are you really going to let peanut containing products in your house anyway, or ya just want to be slack on the younger child? (Just curious, not accusatory, in case you misinterpret the tone [img]http://uumor.pair.com/nutalle2/peanutallergy/wink.gif[/img] )

My DD's tested positive by skin prick 4 years ago to peanuts. We didn't need to go further, since my DS is allergic, too. Total avoidance. Retested her last week, she was negative. We're doing the CAP-RAST just so we can be sure its TRULY negative. If it's not, NO big deal. At least we do know she's not TREE nut allergic.

My DS retested today and his allergies have tripled since his last testing. He's allergic to SO much more. Will DD, regardless of her test results, be eating peanuts anytime soon? Nope. Not until her big brother is off at college somewhere.

~phos

We have a 100% nut free home and plan on keeping it that way. Since we've know about our PA daughter, she hasn't had one exposure at all. No cross contam or anything at all.

First of all you are to be commended that your pa daughter has never had a reaction, wish I could say the same [img]http://uumor.pair.com/nutalle2/peanutallergy/smile.gif[/img] I guess actually I can LOL. My 9 yod was diagnosed as PA at around 1 (I think) her brother was already pa so there was no big deal really. She has never had a pa reaction. Her only anaphalactic reaction was a mystery reaction (we think it was to pollen as it was during hurricane season and VERY windy).

My ds on the other hand has had many pa reactions over the years with 4 or 5 of them anaphalctic (3 of the anaphalactic were to contact with residue that was not visible to the eye).

Last summer we had both of the pa kids RAST tested at my insistance even though the allergist doesn't think they are as accurate as SPT and dd came back negative to everything and ds was a class 3 on shellfish - 0 to Peanuts! So we did a SPT and he was a 4+ to Peanuts and Shellfish (and dust, cats and bunnies [img]http://uumor.pair.com/nutalle2/peanutallergy/frown.gif[/img] ) These are all things that he has had documented reactions to other than the shellfish which he has never had.

sorry this is so long. My theory is that he tested 0 on the SPT because he had no prior exposure to peanut butter. I'm just guessing but am assuming that if they re-did the test after he has consumed it once or twice the allergy would probably show up. I'm not a doctor and this is just a "guess".

HTH,
Valerie

I would want to know if he is allergic or not so that you can make proper accomodations for him in daycare/playdates and when he enters school.
Would be better to know so that he has an epi and all the things you do for your daughter rather than him have a serious reaction and not be prepared.
I realize you have an epi pen, but if he is with someone and you aren't there or your other child is not there, you may not have epi available to him. I am sure you ask people to avoid PB and all of that, but you never know!!!
I would not test until he is in a situation like school or daycare where it would be safer for him if you knew about the allergy.
I have been told by my dr that sp testing is more accurate than blood test for food allergies.

[This message has been edited by saknjmom (edited March 21, 2006).]

This las test was required for his Pre-K registration. I would love to know for sure if he's PA or not. I think we will schedule another skin prick test (this will be his third) and decide from there what to do. His Allergist will write him up so he will have the same 504 in place at school along with my PA daughter. I would like to know for sure but I'm really worried about subjecting him to an oral challenge. The way it stands now, he will be treated at school as if he has PA. I really want to get more info. I don't know how he could have scored a 2 on his blood test when he has NEVER had any peanut or tree nut products or a cross contam. Can his blood test show a positive because of his allergy to dust mites?